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    Wyświetlanie 1-4 z 4
    Tytuł:
    High kinetic energy dense plasma jet
    Autorzy:
    Voronin, A.
    Gusev, V.
    Petrov, Y.
    Sakharov, N.
    Abramova, K.
    Hellblom, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/147488.pdf
    Data publikacji:
    2006
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    plasma gun
    spherical tokamak
    fuelling system
    Opis:
    Researches on the plasma jet source and injection of hydrogen plasma and neutral gas jets into the Globus-M spherical tokamak are presented. A novel source of dense plasma with high directed velocity is designed, constructed and investigated. This is a double stage system consisting of an intense source utilizing titanium-hydride grains for neutral gas production and a conventional pulsed coaxial accelerator. Optimization of the accelerator parameters, so as to achieve a maximum possible flow velocity with a limited discharge current and a reasonable length of the coaxial electrodes is performed. The calculations are compared with the experiment. A test bed is used for investigation of the intense plasma jet generated by a plasma gun. Plasma jet parameters, among them pressure distribution across the jet, flow velocity, plasma density etc., were measured. Plasma jets with densities of up to 1022 m 3, total numbers of accelerated particles (1 5) . 1019, and flow velocities of 50 100 km/s were successfully injected into the plasma column of the Globus-M tokamak. Interferometric and Thomson scattering measurements confirmed a deep jet penetration and a fast density rise (<0.5 ms) at all spatial points up to the radius r H 0.3a. The injection did not result in plasma degradation.
    Źródło:
    Nukleonika; 2006, 51, 1; 85-92
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Dense plasma source development and jet injection in Globus-M*
    Autorzy:
    Voronin, , V. A.
    Gusev, V. K.
    Petrov, Y. V.
    Mukhin, E. E.
    Tolstyakov, S. Y.
    Kurskiev, G. S.
    Kochergin, M. M.
    Hellblom, K. G.
    Powiązania:
    https://bibliotekanauki.pl/articles/147768.pdf
    Data publikacji:
    2008
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    plasma gun
    spherical tokamak
    fuelling system
    Opis:
    Progress in the development of a plasma jet source and its utilization for injection of hydrogen plasma and neutral gas jets into the Globus-M spherical tokamak are presented. The latest version of the high kinetic energy gas and plasma jet source with titanium hydride grains is described. Reproducibility of the gas jet generation was increased due to automatic loading of fresh grains into the source before every shot. It allows producing stable gas release for many discharges. Impurity radiation intensity from the plasma jet was decreased by more than 100 times by preliminary processing titanium hydrate grains and developing a new filter. The result of special experiments on two colliding jets is discussed. It was confirmed that the plasma jet recombines into a gas jet after it escapes the source edge and has a kinetic energy higher than the hydrogen ionization potential. Hydrogen plasma jet with low impurity content has a density up to 2 × 1022 m-3, a total number of accelerated particles (1-5) × 1019 and a flow velocity of ~ 200 km/s. It was used as an instrument for density control in Globus-M. Jet injection into deuterium plasma core during current plateau phase led to fast density increase in all spatial points of the plasma column including the plasma central region. Such injection allowed density doubling in the tokamak plasma. The model predictions are consistent with the experimental observations of the density raise recorded by the interferometer and Thomson scattering.
    Źródło:
    Nukleonika; 2008, 53, 3; 103-109
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Development of quality management system under ISO 9001:2015 and Joint Inspection Group (JIG) for aviation fuelling service
    Autorzy:
    Ruamchat, K.
    Thawesaengskulthai, N.
    Pongpanich, C.
    Powiązania:
    https://bibliotekanauki.pl/articles/406960.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    ISO 9001
    QMS
    integration system
    quality assurance
    aviation fuelling service
    Opis:
    The Joint Inspection Group (JIG) standard for aviation fuel quality management assists in the operational process and maintenance of aviation fuel from its point of origin and through distribution systems to airports. Currently, problems arise as the JIG standard and quality management in aviation fuel are isolated and have independent procedures. Merging the JIG standards with ISO 9001:2015 can override original JIG’s philosophy by connecting all quality assessment, and management parties involved, throughout the supply chain. This integration can harmonize auditing tasks, focusing on risk/opportunity, and continue quality improvement focus. This paper proposes a development of quality management system (QMS) under ISO 9001:2015 for aviation fuelling service in a systematic way. The content and critical success factors of ISO 9001:2015 and JIG standards were studied. The beneficial synergies, similarities, and logical linkages between both standards are identified. This QMS was developed in the largest petroleum company in Thailand and 60 selected experts were surveyed, with a response rate of 88.3%, for their agreement on integrated criteria. Two external quality auditors, who have ISO 9001 and JIG expertise, were interviewed to modify our initial proposed QMS. The final QMS was implemented in the into-plane fuelling services as the first phase of this implementation. Results of framework implementation are discussed in a case study. There are mutual benefits resulting from the integration of JIG and ISO 9001:2015 standards. This QMS provides a unified process for quality management practices, and enhances the effectiveness of risk evaluation as well as the opportunity for continued quality improvement. It facilitates the identifi- cation of ISO 9001:2015 requirements and establishes relationships between the roles of JIG standard and the clauses of ISO 9001:2015. The first experience from five airports as the pilot study of proposed QMS implementation minimized conflicts and duplications between JIG and ISO 9001:2015 standards, reduced the number of into-plane fuelling service incidents reported, such as oil spill, machine stoppage, re-inspections, and recall costs.
    Źródło:
    Management and Production Engineering Review; 2017, 8, 3; 50-59
    2080-8208
    2082-1344
    Pojawia się w:
    Management and Production Engineering Review
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Podstawowe uwarunkowania oraz efektywność wykorzystania paliwa gazowego do napędu silnika spalinowego z zapłonem samoczynnym
    Basic conditions and effectiveness of replacement of conventional liquid fuel with gaseous fuel to combustion engine drive
    Autorzy:
    Postrzednik, S.
    Żmudka, Z.
    Przybyła, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/133737.pdf
    Data publikacji:
    2013
    Wydawca:
    Polskie Towarzystwo Naukowe Silników Spalinowych
    Tematy:
    zasilanie silników
    paliwa gazowe
    dwupaliwowy system zasilania
    efektywność układu
    fuelling of internal combustion engines
    substitution of fuels
    gas fuels
    dual fuel system
    efficiency
    Opis:
    Tłokowe silniki spalinowe zasilane są zazwyczaj paliwami ciekłymi (benzyna, olej napędowy). Aktualnie do napędu silników spalinowych wykorzystywane są często także paliwa gazowe. W tym zakresie zwykle stosowane są systemy z zapłonem iskrowym, chociaż spotkać można inne rozwiązania. W przypadku silników z zapłonem samoczynnym wymagane jest zastosowanie podwójnego systemu paliwowego (tzw. systemu dualnego), w ramach którego łącznie z paliwem gazowym podawana jest nieduża dawka paliwa ciekłego, która inicjuje zapłonu przygotowanej gazowo - powietrznej mieszanki palnej. Dla zapewnienia, że proces spalania przebiegać będzie prawidłowo, a pracujący silnik osiągnie wymagany moment obrotowy (moc efektywną), sze-reg uwarunkowań powinno być ściśle dotrzymane. W pracy dokonano teoretyczno - obliczeniowej analizy uwarunkowań związanych z prawidłowym funkcjonowaniem silnika spalinowego, wyposażonego w dwupaliwowy system zasilania; w aspekcie uwarunkowań stechiometrycznych oraz pozyskiwanego momentu obrotowego.
    Internal combustion engines are fuelled mostly with liquid fuels. Nowadays more and more the gaseous fuels are applied as driving fuel of combustion engines. In case of spark ignition engines the liquid fuel (petrol) can be replaced totally without additional troubles by the gas fuels. This possibility in case of compression engines is essentially restricted. Self-ignition of the fuel gas appears at higher temperatures in comparison to self-ignition of classical diesel oil. Solution if this problem can be achieved by using of the dual fuel system. The diesel engine can be fulfilled with the fuel gas basically, but for ignition of the prepared fuel gas - air mixture a specified amount of the liquid fuel (diesel oil) should be additionally injected into the combustion chamber. Diesel engine working with the dual fuel system has to perform simultaneously the needed effective mechanical torque and power output. For assurance that the combustion process in the cylinder proceeds without mistakes and completely, some basic conditions should be satisfied. In the frame of this work, three main aspects of this problem are taken into account: a. filling of the engine, b. stoichiometry of the combustion, c. performance of mechanical parameters (torque, power). A complex analysis of these conditions connected with the dual fuel combustion process has been done and some results of the carried out investigations are presented in the paper.
    Źródło:
    Combustion Engines; 2013, 52, 3; 866-871
    2300-9896
    2658-1442
    Pojawia się w:
    Combustion Engines
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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